RFR: 8360934: Add AVX-512 intrinsics for ML-KEM - enhancement on AVX512_VBMI and AVX512_VBMI2
Shawn M Emery
duke at openjdk.org
Fri Dec 19 08:08:36 UTC 2025
This change allows use of the AVX512_VBMI/VMBI2 instruction set to further optimize decompression/parsing of polynomial coefficients for ML-KEM. The speedup gained in the ML-KEM benchmarks for key generation is between 0.2 to 0.5%, encapsulation is 0.3 to 1.5%, and decapsulation is 0 to 0.9%.
Thank you to @sviswa7 and @ferakocz for their help in working through the early stages of this code with me.
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Commit messages:
- Merge with mainline
- Swap parameter operation with source
- Remove wrong mask from evpsrlvw
- Reverse ordering for vpermb and vpsrlvw instructions
- Switch from vpshldvw to vpsrlvw
- Fix whitespaces
- 8360934: Add AVX-512 intrinsics for ML-KEM - enhancement on AVX512_VBMI and AVX512_VBMI2
Changes: https://git.openjdk.org/jdk/pull/28815/files
Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=28815&range=00
Issue: https://bugs.openjdk.org/browse/JDK-8360934
Stats: 88 lines in 1 file changed: 87 ins; 0 del; 1 mod
Patch: https://git.openjdk.org/jdk/pull/28815.diff
Fetch: git fetch https://git.openjdk.org/jdk.git pull/28815/head:pull/28815
PR: https://git.openjdk.org/jdk/pull/28815
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